<template>
    <div class="list" ref="wrapper">
        <div >
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div> 
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div> 
                <div class="button-list">
                    <div class="button-wrapper border-bottom" v-for="item in hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div> 
                    </div>
                </div>         
            </div>
            <div class="area" v-for="(item,key) in cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div> 
                <div class="item-list" v-for="innerItem in item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">
                    <div class="item">{{innerItem.name}}</div>
                </div>           
            </div>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
    props: {
        cities:Object,
        hot:Array,
        letter:String
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    mounted() {
        this.scroll = new BScroll(this.$refs.wrapper)
    },
    watch: {
        letter() {
            if(this.letter) {
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    },
    methods: {
        handleCityClick(city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    }
}
</script>

<style lang="stylus" scoped>
    .border-topbottom
        &:before
            border-color #ccc
        &:after
            border-color #ccc
    .border-bottom
        &:before
            border-color #ccc
    .list
        position absolute
        overflow hidden
        top 1.58rem
        left 0
        right 0
        bottom 0
        .title
            line-height 0.54rem
            padding-left .2rem
            background-color #eeeeee
            color #666
            font-size .26rem
        .button-list
            overflow hidden
            padding .1rem .6rem .1rem .1rem
            .button-wrapper
                float left
                width 33.33%
                .button
                    margin .1rem
                    padding .1rem 0
                    text-align center
                    border .02rem solid #cccccc
        .item-list
            line-height 0.76rem
            padding-left .2rem
</style>
